Question
The masses of 1 g and 4 g are moving with equal kinetic energies.Calculate the ratio of the magnitudes of their linear momenta.
10J of work is required to take the body from ground to a height 2m. How much energy is required to take the same body from height 2m to 4m?
Solution
Given,
Mass, m1 = 1 g
Mass, m2 = 4 g
Let v1 and v2 be the velocity of masses m1 and m2 respectively.
Kinetic energy is equal.
Therefore, 
This is the required ratio of linear momentum.
